Spectra S2 Plus Single / Double Electric Breast Pump Kit Spectra S2 Plus (1198136_EA) 1/EAPowerful 270 mmHg suction strength and adjustable suction levels for comfortable pumping Closed system with backflow protection to guard against bacteria Works as single or double pump Massage mode which simulates the natural suckling of baby, and backflow protection to keep breast milk from harmful bacteria, make this a great choice for hospital grade pumping that doesn't compromise on convenience Built in night light In addition to pump, kit